$2\left(4a\:+\:3b\right)\:-\:3a\:-\:b$
$m^2-1m+12$
$-17x^2+36x-21$
$x^2+4x+4-10x-5$
$3\:+\:5\:+\:2\:x\:6\:-\:2\:x\:8$
$2x\cdot10x$
$100x^3+20x^2+x$
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